Combined pugmill and tail gate for truck bodies



March 8, 1955 w. H. wYLlE COMINED PUGMILL AND TAIL GATE FOR TRUCK BODIESFiled Aug. 12, 1 955 www?? Wy M ATTORNEYS March 8, 1955 w. H. wY| |E2,703,704

COMBINED PUGMILL AND TAIL GATE FOR TRUCK BODIES Filed Aug. 12, 1953 I5Sheets-Sheet 2 y 7.2.7. .53 6 7`J- INVENTOR i 5+ WHW/'glie Q L BY MVMATTORNEYS March 8, 1955 w. H. wYLlE 2,703,704

COMBINED PUGMILL AND TAIL GATE, FOR TRUCK BODIES Filed Aug. l2, 1953 l 3Sheets-Sheet 3 INVENTOR ATTORNEYS machine.

United States Patent COMBINED PUGMILL AND TAIL GATE FOR TRUCK BODIESWiiliam H. Wylie, Oklahoma City, Okla., assignor to Wylie ManufacturingCo., Inc., Oklahoma City, Okla.

Application August 12, 1953, Serial No. 373,827

1 Claim. (Cl. 259-157) This invention relates to a combined pugmill andtailgate for hopper or truck bodies.

In the patching of roads with tar or asphalt mixes, generally consistingof various amounts of asphalt, sand and gravel or cinders, it isdesirable that the mixture be heated and mixed to a point where itbecomes pliable, so that the material may be spread out on the road, andalso being hot will have a bonding effect to the road surface. it is anobject of this invention to provide a combined pugmill and tailgate formounting onthe rear of a truck or hopper body so that the road patchingmaterial may be heated and thereby made pliable.

A great many county and State highway maintenance departments preparetheir road and street patching material by spreading a mixture of sandand gravel along the right-of-way, and spraying hot Vliquid asphalt ontop of the above material. Immediately after the asphalt is sprayed onthe sand and gravel it is turned and mixed over and over many times witha motor patrol or grader by turning or rolling the material with theblade of the After the proper proportion of asphalt has been added, andthe material turned and mixed suliiciently, it is stockpiled in what istermed windrows, and left until the mixture is needed for patching.

lt may be weeks and even months before the above mixed material is to beused, and in most cases the asphalt has settled down in the stockpileand has become separatedfrom the sand and gravel. The mixture has alsolong since lost its original heat and has become a cold mixture, andunsuitable for a good patching material.

1t is at this point that the pugmill and tailgate unit to be hereinafterdescribed becomes effective so as to reheat and remix the blade-mixedpatching material, and to bring it back to the hot, pliable and workablestate necessary for proper patching.

Another object of this invention is to provide an imt proved pugmillwherein the material may be in a continuous operation from one end ofthe device for discharge onto the road, or may be delivered to a pan orreceiver suspended from the discharge end of the mill.

A further object of this invention is to provide an improved conveyor ina pngmill for moving the material toward the discharge end of thedevice.

With the above and other objects in View, my invention consists in thearrangement, combination and details of construction disclosed'in thedrawings and specification, and then more particularly pointed out inthe appended claim.

In the drawings:

Figure l is a longitudinal section taken on the line 1--1 of eitherFigure 2 or 3, showing a combined pugmill and tailgate constructedaccording to an embodiment of this invention.

Figure 2 is a sectional view taken on the line 2-2 of Figure l.

Figure 3 is a detailed end elevation of the device.

Figure 4 is a fragmentary sectional view taken on the line 4 4 of Figurel.

Figure 5 is a fragmentary side elevation of the charging hopper.

Figure 6 is a fragmentary transverse section through the conveyor.

Figure 7 is a fragmentary sectional view taken on the line 7 7 of eitherFigure 3 or 4.

Figure 8 is a fragmentary sectional view, on an enlarged "ice scale,showing the connection between the hopper and the conveyor structure.

Referring to the drawings, the numeral 10 designates generally arectangular plate which forms a tailgate for a truck or hopper body. Theplate 10 has disposed at the upper and lower portions thereof, tubularor angular reinforcing means 11 and 12 respectively, and a pair of studs13 extend from the lower tubular member 12 and from opposite end anges14 which are carried by the plate 10. A substantially U-shaped conveyorhousing or trough 15 is disposed rearwardly of the plate 10 and housing15 has journalled lengthwise thereof, a conveyor shaft 16.

The shaft 16 is journalled in bearings 17 and 18 carried by the endwalls 19 and 20 of the housing or trough 15. The shaft 16 is adapted tobe rotated by a driving means 21 in the form of a driving gear meshingwith a driven gear 22 iixed to shaft 16. Shaft 16 has secured thereabouta conveyor means comprising a plurality of blades 23 which are fixed toelongated angle bars 24.

The 'angle bars 24 have extending laterally therefrom ears 25 andfastening members or bolts 26 engage through the ears 25 so as totightly clamp the angle members 24 about the shaft 16. A jacketgenerally indicated at 27 engages about the conveyor housing 15 and isformed of a forward wall 28, a rear wall 29, a bottom wall 30 and a topwall 31 is formed with a plurality of openings 32 adjacent the verticalsides of the conveyor housing 15 so that heated air, as will behereinafter described, will flow upwardly into contact with the verticalwalls of the conveyor housing 15 and the vertical side walls 33 of achargv ing hopper generaiiy indicated at 34.

The charging hopper 34 is formed of side walls 33, end walls 34 andupwardly and outwardly directed walls 36 with which vertical upper walls37 connect. The inclined walls 36 terminate below the upper ends of theside walls 33 and form a valve seat against which a valve plate 38 isadapted to engage. The valve plate 33 is pivoted as at 39 between theend walls 35, and Valve plate 38 is rocked downwardly and forwardly toopening position by means of a crank handle or lever 4i) secured to ahorizontal shaft 41.

Shaft 41 has fixed thereto, a link 4-2 which Vis pivotally connectedwith link 43 and link 43 is pivotally connected to an ear 44 secured tothe lower side of the valve plate 38.

Link 42 is provided with a stop lug 45 as shown in FigureY 2, which willlimit the upward swinging of the two links 42 and 43 slightly past thealigned position of these links so that when valve plate 38 `isin closedposition the links 42 and 43 will be in a locked position.

The charging hopper 34 also includes outer vertical walls 46 spaced fromthe inner walls 33 forming a passage 47 through which the heated air isadapted to iiow. The jacket walls 46 are connected with divergent jacketwalls 4S and walls 43 have extending upwardly therefrom, vertical walls49 which are connected to a top wall 50. The vertical walls 49 areprovided with discharge ports 51 through which the heated air is adaptedto be exhausted. The charging hopper 34 is removably mounted on theconveyor housing 15 by means of a removable hinge pin 52 engagingthrough ears 53 carried by the top wall 31.

Inner hopper walls 33 as shown in Figure 2, telescope downwardly a shortdistance into conveyor housing 15 so as to form a tight connectionbetween hopper 34 and conveyor housing 15. Hopper 34 is also formed witha bottom wall 54 disposed between wall 33 and wall 46 and bottom wall 54is formed with openings 55 which register with openings 32.

The space 56 about conveyor housing 15 within jacket 27 is adapted to beheated by means of a burner 57 which extends through end wall 20.

A bafe plate 5S is secured to bottom wall 30 of jacket 27 and ahorizontal bale 59 is suspended by suspension means 60 from the bottomof housing 15. The heat and products of combustion emanating from theburner 57 are adapted to flow forwardly over the forward end of baffle59 and also over the forward ends of a pair of baille plates 61 whichare secured between housing 15 and housing 27 as shown in Figure 2. Theforward end of the conveyor has fixed thereto, a discharge blade 62which is secured to one of the angle members 24 and is positioned withinthe discharge end of the housing 15. The housing has a discharge port 63formed at its discharge end and a curved valve plate 64 is adapted toclose or open the discharge port 63.

Valvey plate 64 has yfixed thereto, a sector shaped plate 65 which ispivoted on a fixed stud 66 carried by end wall 19. An operating lever orhandle 67 is secured to sector plate 65 and projects laterally outwardlyfor movement upwardly to a valve opening position.

Where it is desired touse the material such as tar or asphalt mixturefor small patches in a road, the heated and substantially mixed materialis discharged from port 63 into a pan 68 which is suspended below thepugmill. The pan 68 includes a bottom wall 69, opposite side wall '70with an upwardly directed forward wall 71 and a vertical rear wall 72.The rear wall 72 has iixed to the opposite vertical edges thereof, sidewalls '73 and a top wall 74 is txed to the rear wall 72 and the sidewalls 73.

A bracket 77 extends from the tailgate 1t) and is formed with adepending ear 78 through which a pan supporting shaft 79 is adapted toremovably engage.

An ear 80 extends from bottom wall 30 with shaft or pin 79 engagingthrough ear 80. -A bushing 81 is formed at the forward end of top wall74 at one end thereof and a second bushing 42 is formed at the oppositeend of top wall 74. A cover plate 83 engages over the top of housing 15forwardly or to the left of charging hopper 34. Plate 83 is removable sothat the interior of housing 15 may be readily cleaned.

In the use and operation of this pugmill, the device is secured by meansof the studs 13 to the rear of a truck or hopper body. Burner 57 isconnected with a suitable source of fuel supply and drive member 21 isoperated from a suitable power means. The tar or asphalt material isdischarged into the charging hopper 34 and may be retained in thishopper for a short time until the material is in a substantially pliablestate.

At this time plate 38 will be in a closed position. When the material isin a substantially uid or liquid state, lever 40 is rocked forwardly asviewed in `Figure 1 so as to swing valve plate 38 downwardly to an openand hopper discharging position. -The material dropping into conveyorhousing 15 will be moved therealong and will be additionally heated fromthe heat about housing 15. When the material reaches the left end ofconveyor housing 15, delivery blade 62 will push the material outwardlyor rearwardly through delivery port 63.

If the material is to be used by patching small holes in a road,receiver or pan 68 will be disposed below delivery port 63.

lIf the material is being discharged in a long trench, pan 68 is removedby pulling out suspension pin or shaft 79. The material will then dropdirectly downwardly from delivery port 63 into the trench.

The device hereinbefore described will provide a convenient meanswhereby the road patching material can be maintained in a lluid state upto the time of delivery of the material onto the road. This device willthereby save a considerable amount of lost time in initially heating thematerial and then placing the material in a truck body for removal fromthe body onto the road.

The purpose of the hopper is to act as a charging chute, as the materialis shoveled from the truck body into the pugmill unit. The hopper isequipped with a toggle controlled or operated gate, which retains thematerial in the hopper until it is to be dumped into the pugmill below.The hopper is double walled and the hot gases from the burner passupward through the walls, and thus prehcat the material to some degreeprior to its being released into the pugmill. The material, sand, graveland asphalt, after passing through the cycle of heating and mixing inthe pugmill, reaches a hot pliable state, so that the material may bereadily spread out on the road, and so that the material will adhere tothe road.

The pugmill and tailgate unit herein disclosed, may also be used as amixer for producing asphalt patch material, by charging the sand andgravel into the pugmill and adding asphalt with a ladle or bucket.

What is claimed is:

A combined pugmill and tailgate comprising a rectangular tailgate, apair of laterally projecting studs carried by the opposite ends of saidtailgate for mounting said tailgate on the rear of a truck body, aconveyor housing fixed to the rear side of said tailgate, a conveyor insaid housing, a charging hopper on the top of said housing, a valveregulating the discharge of material from said hopper to said housing, adischarge blade fixed to the discharge end of said conveyor and disposedin a plane parallel to the longitudinal axis of said conveyor, adelivery valve carried by said housing, and means heating the materialin said housing and said hopper.

References Cited in the tile of this patent UNITED STATES PATENTS1,600,948 Poore Sept. 2l, 1926 2,054,042 Pipes Sept. 8, 1936 2,142,588Medley et al. Jan. 3, 1939

